Machinery for piercing metallic blooms or ingots.



W. U. JACKSON & J. E. JOSEPH.

MACHINERY FOR PIERGING METALLIC BLOOMS 0R INGOTS.

IIIIIIIIIIIIIIIII E0. 7, 1907. 916,875 Patented Mar. 30, 1909.

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an; un nmmm I "Ill mum IIIIIIIH g! m g %m M 0- APPLICATION FILED DBO. 7, 1907.

Patented Mar. 30, 1909.

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Q a? l s w PM. W. i 1 m l ...i.7l I \IrI-.. HMWWL. 4 I m 5 m N MN an u W Rx \s Wflnwses I Q? m/Wmz nNrrE srArEs rA'rENr enrich WILLIAM UPRICHARD JACKSON, or HEATH TOWN, AND JOHN EDWARD JOSEPH, OF ASTON MANOR, NEAR BIRMINGHAM, ENGLAND, ASSIGNORS TO THE WELnLEss STEEL TUBE CO.

LIMITED, OF BIRMINGHAM, ENGLAND.

MACMNEEY FOQ PIERCING METALLIC BLOOMS R INGOTS.

No. e 'asrs.

T 0 all whom it may concern:

Be it known that we, WILLiAM UPRICHARD JACKSON and JOHN EDWARD JosEPH, subjects of the King of Great Britain, respec- 5 tively residing at Bushbury Road, Heath Town, Staifordshire, England, and No. 4 Lynton Road, Aston Manor, near Birmingham, England, have invented certain new and useful Improvements in Machinery for Piercing Metallic Blooms or lngots, of which the following is a specification.

Our invention consists of the improvenents hereinafter described in machinery for the piercing of blooms or ingots in the manufacture of weldless metallic tubes and other hollow or tubular bodies the said improvements having for then principal object to facilitate the manufactureof the said articles.

In order that our invention may be the better understood we remark that in the ma chinery to which the said invention relates as herebefore constructed or proposed, the Eiercin ofthe heated bloom or ingot has een e 'ected generally by a relative movement between the die or matrix, constituting the heated ingot or bloom container and the lercing mandrel, the die or matrix being eld stationar while the piercing mandrel advances axia ly into the heated ingot or bloom; or the die or matrix receives motion so as to advance the heated ingot or bloom against the stationary piercing mandrel; or both die or matrix and piercing mandrel have received motion in opposite directions.

With, the arrangements hereinbefore referred to the removal of the weldless metallic tube or other hollow or tubular body formed, from the machine is attended with difficulty which it is one of the Objects of the said invention to obviate. In other machines in which a stationary piercing mandrel has been employed the die or matrix is also preserved stationary during'nearly the Whole of the piercing 0perat1on a ram-working in the die or'matrix forcing the heated bloom or billet therefrom on to the stationary mandrel.

In carrying our invention into effect we provide for the simultaneous movement in the same direction duringthe. major part of the piercing operation of the die, matrix and piercing mandrel the said parts moving practically as one.

} seseficaaon of Letters Patent. a plication filed December 7, 1907. Serial No. 405,572.

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Patented March 30, 1909.

The heated ingot or during the piercing o eration. by a bac stop which may be solid ut is preferably made The tubular back sto within it a supplementary solic supporting bar of the same or approximately the same diameter as the piercing mandrel.

bloom is sup orte d may have The parts of the machinery are so arranged and worked that when the piercin inahdrel is I approaching or nearing the comp etion of the piercing operation the su lementary solid supporting bar, where a so 1d supporting bar is used, retires in the tubular supporting back stop and permits the piercing of the bloom or ingot from end to and Where a solid supporting back stop is employed a short intervening tube or die is provided to receive the wad ofmetal which is pressed from the bloom or ingot-as the mandrel completes the plercing process or to permit the piercing tool to pass completely through the bloom or ingot.

Figures 1 and 2 of the accompanymg drawings represent in side elevation and plan respectively machinery containing the 1mprovements constituting our invention for the piercing of the blooms or ingots'm the manufacture of weldloss metallic tubes and the like. Fig. 3 is a cross section taken on the dottedline at, m Fig. 2. Figs. 4 and 5 repre-' sent portions of the machinerypartly in plan and partly in horizontal section, drawn to a larger scale than Figs. 1, 2 and 3 and illusdescribed of our trate theaction hereinafter improved machinery.

The samecharacters of refere11oe,1nd1cate the same parts in the several figures of the drawings... 1 a is the. hydraulic cylinder of the machinery by the hydraulic pressure in whlch the ram 6, mandrel d and holder or carrier 9 inolosing thematrix gand die 9 are actuated as is hereinafter described: 0 is the cross head'ofthe ram 1) to which GIOSSlwml i/lw iercing mandrel d is attached as is best seen in Figs. 2, land 5. From the fixed crosshead a} of the hydraulic c linder a .tO the rear end of the machine two lbngitudinal rods 6, e extend the said rods constituting honzontal guidesfor the moving parts of the machineryhereinafter described. The opposite sides' of the crosshead c are tubular the tubular parts beingsituated on the guide Infront of the orosshead c is a trolling pressure'is exerted by the die 9 bolts m, m.

crosshead f between which and the crosshead 9 of the die and matrix holder 9 are tubular stays h, h situated on the rods 6, e.

Z is the support for the tubular backstop 7c to which support t the rear ends of the guide The action of the machineryis as Aheated billet Z having been introduced into the ingot containeror matrix g and die-g {fixed to theisaid matrix g. as is represented I Y in Fig. 4, a short tube or ferrule'p isplaced'in the front end of the die g to guide thejbulb of the mandrel d and insurefitentermgjthe billet-Z axially in the initial stagejof the plercing operation.

by the ram 1) the said mandrel being guided by the crosshead until the bulb of th'e necting the cylinder and back stop, a matrix mandrel d enters t e ferrule and comesin contact with the front end 0' the billet l in the (110 g as is represented in Fig. 4. When by'the continuing forward movement of'the ,on said guides and arranged slightly in a 'vance of a cooperating part movable with the mandrel whenthe latter is in fully retracted position, and members cooperative with the ram bthe bulb of the mandrel d has been forced into the billet Z tethe extent indicated in dotted lines in "Fig. 4 the crosshead "dis brou ht into contact with the crosshead- 'f who together with the die "and matrix 9.,-

has been up to this stagestationaryfieom. sequently ur1n the completion of the'p ierc mg 0 eratlon t e ram b, crosshead cl man-v drel cros shead f, tubular stays h, 7t matrix and die holder 9, g and die g -and matrix gi therein move forward as one.- .As the billet Z within the now traveling die 9 and matrix g is prevented from advancing with the die 9 and matrix g by the short tube n at the front end of the tubular back stop the plercm actlon of the mandrel continues and a tubu ar billet is formed the metal of the tubular blllet exuding from the mouth of the.

traveling die 9 in which the piercing action takes place. i r f From the description hereinbefore given it w1ll be understood that an external con Z the bulb of the mandrel thereby effecting the completion of the piercing operation as 1s represented in Fig. 5.

By the manufacture of tubular billets by the lmproved machinery hereinbefore de- 0 by longitudinal,

On the starting of the machinery the mandrel d is carried forward scribed and represented the tubular billet formed is automatically removed from the die and matrix or in ct container and the removal of the man rel from the tubular billet formed facilitated.

' On the reversing of the motion of the hydraulic ram 6 and the return of the parts to the normal positions represented in Figs. 1 and 2, the mandrel d is removed from the Weldless tube or tubular billet formed which falls from the machinebut the bulb of the mandrel which is as usual loosely fitted on the end of the mandrel is left in the short tube at. 1 The return of the die and matrix holder 9 to its normal position does not commence until the nuts m m on the bolts m, m reach the projecting tubular bushes on the opposite sides of the crosshea'd f.

v Having now described our invention what we claim as new and desire to secure by Let ters Patent is 1. A machine for piercing blooms or ingots comprisinga power cylinder, a back stop, a pair of longitudinally extending guides conholder slidable longitudinally on said guides, a piercing mandrel operable by the ower cy inder, a cross head slidable longitu inally respective guides and connecting the matrix holder and cross head whereby a simultane ous advancing movement is imparted to the matrix holder from the mandrel during the major part of the piercing operation of the bloom.

2. A machine for piercing blooms or ingots comprising a longitudinally movable matrix holder, a relative y fixed back sto arranged at one end thereof, a piercing mandrel having lnlgeans. for giving it a 'reliminary advancing ovem'ent to pierce t is end of a bloom contained in the matrix holder, means for simulta r'ieously advancing the matrix holder during the corresponding movement of the man 0 oration, and means operably connected to t e mandrel for returnlng the matrix holder drel during the major portion of the piercing I toinitial position during the retraction of the mandrel.

3,. A machine for forming tubular bodies comprising a longitudinally movable matrix holder, a relatively fixed back stop, a piercing mandrel having means for advancing it preliminarily to pierce a bloom containedin said holder, a cross head connected to and movable with the matrix holder and adapted to be engaged by a part carrying the mandrel to impart a simultaneous advancing movement to the matrix holder after the said preliminary movement and during the major'part of" the piercing operation, and rods movable with the mandrel and having parts to engage port and havin one end formedto'enter t '0 forward end of amatrix in said holder, a

piercing mandrel mounted in cooperativere-v lation ith the matrix holder, and means for preliminarily advancing the mandrel to enter the latter in the bloom and foruthereafter simultaneously advancing the mandrel and matrix holder during the piercing operation, the hollow back stop being adapted to receive the Wad of metal removed by the mandrel from the end of the bloom. v f i 5. A machine for piercing blooms or ingots comprising a matrix holder and/a piercin mandrel arranged in cooperative relation an adapted to ermit a preliminary piercing movement 0' the mandrel and a subse uent simultaneous advancing movementjio the mandrel and matrix during the major art of' s the piercing operation, a hollow bac stop having an end, adapted to enter a matrix in said holder, and a hollow liner adapted to fit into said matrix and to cooperate With wad of metal from the bloom and permit it to pass into the hollow back stop.

6. A tube forming machine comprising a hydraulic cylinder having a ram mounted to operate therein, a support provided with a back stop, longitudinal rods rigidly connect ing said support to said cylinder, a cross head attaphed to said ram and having its opposite sides'fitted to slide on said longitudinal rods, a piercing mandrel carried by the said cross head, a secondary cross head also slidable on In testimony whereof We have'hereunto set 5,

our hands in presence of two subscribing witnesses. l

WILLIAM UPRIOHARD JACKSON. 7 JOHN EDWARD JOSEPH. Witnesses RICHARD Sxnnnnrr, ARTHUR JOHN POWELL.

said longitudinal rods and constituting a r 

